Consider the function z=f(x,y). If you start at the point (4,5) and move toward the point (5,6), the direction derivative is sqrt(2). Starting at (4,5) and moving toward (6,6), the directional derivative is sqrt(5). Find gradient f at (4,5).(adsbygoogle = window.adsbygoogle || []).push({});

Okay, this is probably a simple problem, but I don't know how to start it. Help appreciated.

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# Gradient help

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